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    Question

    18 skilled workers can complete a task in 12 days while

    24 semi-skilled workers need 15 days to complete the same task. 12 skilled workers started the task but 3 of them left after a few days. How many semi-skilled workers should replace the 3 skilled ones who left so that the task can be completed in the stipulated time?
    A 7 Correct Answer Incorrect Answer
    B 5 Correct Answer Incorrect Answer
    C 4 Correct Answer Incorrect Answer
    D 6 Correct Answer Incorrect Answer

    Solution

    Let the skilled workers =a and semi-skilled workers=b 18a ×12 =24b ×15 3a =5b 3 skilled workers =5 semi-skilled workers. Therefore, we can say that in place of 3 skilled workers, 5 semi workers can come.

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